If you look at the barrel diameter (28 gauge my guess) it isn’t that large, it is just long. On a previous thread, we determined it was a Browning 248 in 28 gauge which is rather long so the scale is about right. (plus he is boney)
Looks to me like a Browning Citori Lightning Sporting Clays model in 12 gauge with 28” barrels. It has the Browning Sporting pad (not the honeycomb brown field model), and a front Hi-Viz bead and mid-bead. It’s not a Special Sporting because it has the low post rib. The typical lightning type fore end as opposed to the schnable type found on the 525, 625, and 725 guns. Never seen a 28 gauge browning that was ported, mostly 12’s and some 20’s.
Sort of a nice general purpose target O/U (i.e. too short for sporting, too light for a dedicated skeet gun). Interesting that it has a Diana Grade extended choke in the top barrel, but either a flush choke or no choke (bad idea) in the bottom barrel.